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Thread: How to Compute Interest

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    Question How to Compute Interest

    I am supposed to create an Interest Class that accepts values for principal, interest, years to produce outcome accumulation. I am just learning Java and using BlueJ, this is what I have so far. It compiles with no syntax errors but does not perform the function. Help?

    public class Interest {
          private  int rate;
          private int principal;
          private int years;
          private int interest;
     
        public int inputRate(int rate) {
            return rate;
        }
     
        public int inputPrincipal(int principal) {
            return principal;
        }
     
        public int inputYears(int years) {
            return years;
        }
     
        public int getInterest() {
            System.out.println("Interest is : " + interest );
            interest = rate*principal*years/100;
            {
                return interest;
            }
        }
    Last edited by jps; November 11th, 2012 at 04:00 PM. Reason: added code tags and corrected indentation


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    Default Re: How to Compute Interest

    It compiles with no syntax errors but does not perform the function.
    Looks like what is posted does not compile. Perhaps a bracket was missed while copying to the forum. In either case, draw your attention to the bracket that should close the class.

    The three methods: inputRate inputPrincipal inputYears do nothing special. They take in a value and spit it right back to where it come from without modifying or saving the value. Not very useful. All three method names are not very descriptive to their purpose (once they have a purpose). The methods should accept a value and set the variables being used in the getInterest method.

    Related search terms: "Java class fields" "getters and setters" "java naming conventions"

    On the way out the door, I have never touched BlueJ, and know nothing about it (except I heard BlueJ handles the main method). There may be problems related to BlueJ specific requirements I am unaware of so take my advice knowing I know nothing about BlueJ.

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    Default Re: How to Compute Interest

    heheh, no worries, even the instructor doesn't know how to work Bluej, much less how to program in Java. He gave an assignment on something he has NEVER taught, and when I came up with the code above that didn't work he told me to google the correct way... At least now I know for a fact that my methods need more attention.Will try again and repost

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    Default Re: How to Compute Interest

    i guess the simple code to execute this would be this;
    ...
    Last edited by copeg; December 4th, 2012 at 10:09 AM. Reason: removed spoonfed code

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    Default Re: How to Compute Interest

    @bhavesh, please read the forum rules and the following: The Problem with Spoon-feeding

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    Default Re: How to Compute Interest

    buddy i was just trying to explain you da logic now if you are completely relied on learning java on the basis of blueJ den wish u luck, but hardly people prefers it.. Dont just learn the creamy layers of programming by these tools, understand it instead, dat will be more helpful.
    Happy coding

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